Yeah this is a really excellent point thank you. I was actually thinking about ergonomics of the workspace above, but the bending, twisting and reaching is going to be an issue.
I can see how the 45deg plan could make the racks less accessible, especially for the shorter armed members of my house.
Even if loading from the front was equivalent to loading from the side, my plan would encourage you to load from the corner, which is probably not great.